" PROCESS FOR BLEACHING LIGNOCELLULOSE-CONTAINING NON-WOOD PULP"
Application 2128/CHENP/2004 published 2006-03-03, filed 2004-09-23
The present invention refers to a process for bleaching lignocellulose-containing pulp comprising pulp obtainable from lignocellulose-containing materials selected from the group consisting of non-wood with a peroxide-containing compound, where the pulp prior to the bleaching is treated with chlorine dioxide, characterised in that the pulp after the treatment with chlorine dioxide is treated in a separate stage with a chelating agent at a pH up to about 2.9 and washed between the chlorine dioxide treatment and chelating agent treatment.
Applicant
AKZO NOBEL N.V.
P.O. Box 9300, NL-6800 SB Arnhem, Netherland
Inventor
International Info
Classification: D21C 9/10
Publication Number: PCT/SE03/00512
Priority Information
0200981-9 Sweden 2002-03-28